Answer:
A)If interest rates decline, the prices of both bonds will increase, but the 15-year bond would have a larger percentage increase in price.
TRUE
As it has more time to maturity it will have a higher time expose to the rate therefore, will be more volatile against the rate fluctuations
Explanation:
The 10-year ond is issued at premium, above par as the coupon rate 12% is higher than market rate 10%. Each year will decrease the market value to come closer to maturity date.
The 15-year ond is issued at discount, below par as the coupon rate 8% is lower than market rate 10%. Each year will increase the market value to come closer to maturity date.